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Sferra G, Fantozzi D, Scippa GS, Trupiano D. Key Pathways and Genes of Arabidopsis thaliana and Arabidopsis halleri Roots under Cadmium Stress Responses: Differences and Similarities. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12091793. [PMID: 37176850 PMCID: PMC10180823 DOI: 10.3390/plants12091793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/21/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023]
Abstract
Cadmium (Cd) is among the world's major health concerns, as it renders soils unsuitable and unsafe for food and feed production. Phytoremediation has the potential to remediate Cd-polluted soils, but efforts are still needed to develop a deep understanding of the processes underlying it. In this study, we performed a comprehensive analysis of the root response to Cd stress in A. thaliana, which can phytostabilize Cd, and in A. halleri, which is a Cd hyperaccumulator. Suitable RNA-seq data were analyzed by WGCNA to identify modules of co-expressed genes specifically associated with Cd presence. The results evidenced that the genes of the hyperaccumulator A. halleri mostly associated with the Cd presence are finely regulated (up- and downregulated) and related to a general response to chemical and other stimuli. Additionally, in the case of A. thaliana, which can phytostabilize metals, the genes upregulated during Cd stress are related to a general response to chemical and other stimuli, while downregulated genes are associated with functions which, affecting root growth and development, determine a deep modification of the organ both at the cellular and physiological levels. Furthermore, key genes of the Cd-associated modules were identified and confirmed by differentially expressed gene (DEG) detection and external knowledge. Together, key functions and genes shed light on differences and similarities among the strategies that the plants use to cope with Cd and may be considered as possible targets for future research.
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Affiliation(s)
- Gabriella Sferra
- Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy
| | - Daniele Fantozzi
- Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy
| | | | - Dalila Trupiano
- Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy
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2
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Zhou W, Xin J, Tian R. Photosynthetic response, antioxidase activity, and cadmium uptake and translocation in Monochoria korsakowii with cadmium exposure. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:2974-2986. [PMID: 36515200 DOI: 10.2166/wst.2022.392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
To identify the tolerance mechanisms of wetland plants exposed to heavy metal, a hydroponic experiment was used to investigate variations in photosynthetically physiological parameters and antioxidant enzyme activities in leaves of Monochoria korsakowii exposed to 0.05, 0.15, 0.30, and 0.45 mM Cd2+ for 7 d. The Cd2+ concentrations in the plant roots, stems, and leaves were also investigated. Cd2+ exposure significantly decreased the total chlorophyll content, net photosynthetic rate, intercellular carbon dioxide concentration, and stomatal conductance, while stomatal limitation value had the opposite trend (P < 0.05). During Cd2+ stress, ascorbate peroxidase activity significantly increased (P < 0.05). The translocation factor for Cd2+ was significantly lower than that of the control, and both were less than 1 (P < 0.05). Cd2+ stress damaged the photosynthetic apparatus in the leaves. During Cd2+ stress, M. korsakowii alleviated oxidative stress by increasing the activities of antioxidant enzymes, such as APX. Under 0.45 mM Cd2+ stress, increased heat dissipation was responsible for alleviating the photooxidative damage to photosynthetic organs in the leaves. Meanwhile, the majority of Cd2+ was immobilized in the roots, thus alleviating excessive Cd2+ phytotoxicity in the aboveground parts. Generally, M. korsakowii has potential application in the phytoremediation of low-cadmium-polluted water.
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Affiliation(s)
- Wei Zhou
- The authors contributed equally to this work
| | - Jianpan Xin
- The authors contributed equally to this work
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Lebrun M, Michel C, Joulian C, Morabito D, Bourgerie S. Rehabilitation of mine soils by phytostabilization: Does soil inoculation with microbial consortia stimulate Agrostis growth and metal(loid) immobilization? THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 791:148400. [PMID: 34412406 DOI: 10.1016/j.scitotenv.2021.148400] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
Metal(loid) soil pollution resulting from mining activities is an important issue that has negative effects on the environment (soil acidification, lack of vegetation, groundwater pollution) and human health (cancer, chronic diseases). In the context of a phytostabilization process for the bioremediation of a mine soil highly contaminated by arsenic (As) and lead (Pb), a pot experiment was set up to study the effect of plant sowing and microbial inoculation on soil properties, metal(loid) (im)mobilization in soil and accumulation in plant, and plant growth. For this, mine soil was sown with endemic metallicolous Agrostis seeds and/or inoculated with endogenous microbial consortia previously selected for their As and Pb tolerance. Agrostis was able to develop on the contaminated mine soil and immobilized metal(loid)s through metal(loid) accumulation in the roots. Its growth was improved by microbial consortium inoculation. Moreover, microbial consortium inoculation increased soil organic content and electrical conductivity, and led to an increase in soil microbial activities (linked to C and P cycles); however, it also induced a metal(loid) mobilization. In conclusion, microbial consortium inoculation stimulated the growth of endemic Agrostis plants and thus ameliorated the phytostabilization of a former mine soil highly polluted by As and Pb. This study is thus a good example of the benefits of coupling several approaches such as phytostabilization and bioaugmentation for the bioremediation of former mine contaminated sites.
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Affiliation(s)
- Manhattan Lebrun
- Université d'Orléans, LBLGC INRA USC1328, rue de Chartres, BP 6759, 45067 Orléans Cedex 2, France
| | - Caroline Michel
- BRGM, DEPA, Geomicrobiology and Environmental Monitoring Unit, BP 36009, 45060 Orléans Cedex 2, France
| | - Catherine Joulian
- BRGM, DEPA, Geomicrobiology and Environmental Monitoring Unit, BP 36009, 45060 Orléans Cedex 2, France
| | - Domenico Morabito
- Université d'Orléans, LBLGC INRA USC1328, rue de Chartres, BP 6759, 45067 Orléans Cedex 2, France
| | - Sylvain Bourgerie
- Université d'Orléans, LBLGC INRA USC1328, rue de Chartres, BP 6759, 45067 Orléans Cedex 2, France.
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Nazli F, Jamil M, Hussain A, Hussain T. Exopolysaccharides and indole-3-acetic acid producing Bacillus safensis strain FN13 potential candidate for phytostabilization of heavy metals. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:738. [PMID: 33128189 DOI: 10.1007/s10661-020-08715-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 10/26/2020] [Indexed: 05/10/2023]
Abstract
Microbial population of soils irrigated with industrial wastewater may contain certain exopolysaccharides (EPS) and indole-3-acetic acid (IAA) producing bacterial strains having the ability to tolerate heavy metals along with plant growth-promoting (PGP) traits. As cadmium is one of the most toxic heavy metals for soils, plants, animals, and human beings, the present study was planned to isolate and characterize EPS- and IAA-producing, Cd-tolerant bacterial strains having tolerance against heavy metals along with plant growth-promoting traits. A total of 30 rhizobacterial strains (FN1-FN30) were isolated from rhizosphere soil collected from fields around industrial areas and roadsides irrigated with industrial wastewater. Out of these, eight isolates with the combined ability of IAA production and EPS production were characterized for PGP traits. On the basis of multifarious PGP traits and the results of root colonization assay, three most efficient EPS- and IAA-producing, Cd-tolerant plant growth-promoting strains, i.e., FN13, FN14, and FN16, were selected for multiple metal (Cd, Pb, Ni, and Cu) tolerance test along with quantification of growth, and IAA and EPS production abilities under Cd stress. Increasing levels of Cd stress negatively affected the tested characteristics of these strains, but FN13 showed more stability in growth, IAA production (18.24 μg mL-1), and EPS production (148.99 μg mL-1) compared to other strains under Cd stress. The morphological and biochemical analysis confirmed FN13 as Gram-positive, rod-shaped bacteria with smooth colonies of yellow appearance. The strain FN13 has strong root colonization (3.36 × 106 CFU g-1) ability for mustard seedlings and can solubilize Zn and phosphate along with the production of HCN, ammonia, and siderophores. The 16S rRNA sequencing confirmed it as the Bacillus safensis strain FN13. It can be explored as potential phytostabilizing biofertilizer for heavy metal-contaminated soils.
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Affiliation(s)
- Farheen Nazli
- Department of Soil Science, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan.
| | - Moazzam Jamil
- Department of Soil Science, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Azhar Hussain
- Department of Soil Science, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Tanveer Hussain
- Department of Forestry, Range and Wildlife Management, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
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A Review on Practical Application and Potentials of Phytohormone-Producing Plant Growth-Promoting Rhizobacteria for Inducing Heavy Metal Tolerance in Crops. SUSTAINABILITY 2020. [DOI: 10.3390/su12219056] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Water scarcity and high input costs have compelled farmers to use untreated wastewater and industrial effluents to increase profitability of their farms. Normally, these effluents improve crop productivity by serving as carbon source for microbes, providing nutrients to plants and microbes, and improving soil physicochemical and biological properties. They, however, may also contain significant concentrations of potential heavy metals, the main inorganic pollutants affecting plant systems, in addition to soil deterioration. The continuous use of untreated industrial wastes and agrochemicals may lead to accumulation of phytotoxic concentration of heavy metals in soils. Phytotoxic concentration of heavy metals in soils has been reported in Pakistan along the road sides and around metropolitan areas, which may cause its higher accumulation in edible plant parts. A number of bacterial that can induce heavy metal tolerance in plants due to their ability to produce phytohormones strains have been reported. Inoculation of crop plants with these microbes can help to improve their growth and productivity under normal, as well as stressed, conditions. This review reports the recent developments in heavy metal pollution as one of the major inorganic sources, the response of plants to these contaminants, and heavy metal stress mitigation strategies. We have also summarized the exogenous application of phytohormones and, more importantly, the use of phytohormone-producing, heavy metal-tolerant rhizobacteria as one of the recent tools to deal with heavy metal contamination and improvement in productivity of agricultural systems.
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Ismail N'I, Abdullah SRS, Idris M, Kurniawan SB, Effendi Halmi MI, Al Sbani NH, Jehawi OH, Hasan HA. Applying rhizobacteria consortium for the enhancement of Scirpus grossus growth and phytoaccumulation of Fe and Al in pilot constructed wetlands. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 267:110643. [PMID: 32421674 DOI: 10.1016/j.jenvman.2020.110643] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/19/2020] [Accepted: 04/20/2020] [Indexed: 06/11/2023]
Abstract
Pilot-scale constructed wetlands planted with Scirpus grossus, were used to investigate the effects of applying a three-rhizobacterial consortium (Bacillus cereus strain NII, Bacillus subtilis strain NII and Brevibacterium sp. strain NII) on the growth of S. grossus and also on the accumulation of iron (Fe) and aluminium (Al) in S. grossus. The experiment includes constructed wetlands with the addition of 2% of the consortium rhizobacteria and without the consortium rhizobacteria addition (acting as control). During each sampling day (0, 5, 10, 15, 20, 25, 30, 42, 72 and 102), plant height, concentration of Fe and Al and sand microbial community were investigated. The results for the constructed wetland with the addition of consortium rhizobacteria showed the growth of S. grossus increased significantly at 26% and 29% for plant height and dry weight, respectively. While the accumulation of Fe and Al in S. grossus were enhanced about 48% and 19% respectively. To conclude, the addition of the rhizobacteria consortium has enhanced both the growth of S. grossus and the metal accumulation. These results suggesting that rhizobacteria has good potential to restore Fe and Al contaminated water in general and particularly for mining wastewater.
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Affiliation(s)
- Nur 'Izzati Ismail
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
| | - Siti Rozaimah Sheikh Abdullah
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
| | - Mushrifah Idris
- Tasik Chini Research Center, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
| | - Setyo Budi Kurniawan
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
| | - Mohd Izuan Effendi Halmi
- Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia.
| | - Nadya Hussin Al Sbani
- Department of Chemical Engineering, Faculty of Oil and Gas Engineering, Al Zawiya University, Libya.
| | - Omar Hamed Jehawi
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
| | - Hassimi Abu Hasan
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
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Liu S, Yang B, Liang Y, Xiao Y, Fang J. Prospect of phytoremediation combined with other approaches for remediation of heavy metal-polluted soils. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:16069-16085. [PMID: 32173779 DOI: 10.1007/s11356-020-08282-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 03/02/2020] [Indexed: 04/16/2023]
Abstract
Accumulation of heavy metals in agricultural soils due to human production activities-mining, fossil fuel combustion, and application of chemical fertilizers/pesticides-results in severe environmental pollution. As the transmission of heavy metals through the food chain and their accumulation pose a serious risk to human health and safety, there has been increasing attention in the investigation of heavy metal pollution and search for effective soil remediation technologies. Here, we summarized and discussed the basic principles, strengths and weaknesses, and limitations of common standalone approaches such as those based on physics, chemistry, and biology, emphasizing their incompatibility with large-scale applications. Moreover, we explained the effects, advantages, and disadvantages of the combinations of common single repair approaches. We highlighted the latest research advances and prospects in phytoremediation-chemical, phytoremediation-microbe, and phytoremediation-genetic engineering combined with remediation approaches by changing metal availability, improving plant tolerance, promoting plant growth, improving phytoextraction and phytostabilization, etc. We then explained the improved safety and applicability of phytoremediation combined with other repair approaches compared to common standalone approaches. Finally, we established a prospective research direction of phytoremediation combined with multi-technology repair strategy.
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Affiliation(s)
- Shuming Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
- Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha, 410128, People's Republic of China
- Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, 410128, People's Republic of China
| | - Bo Yang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
- Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha, 410128, People's Republic of China
- Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, 410128, People's Republic of China
| | - Yunshan Liang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
- Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha, 410128, People's Republic of China
- Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, 410128, People's Republic of China
| | - Yunhua Xiao
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China.
- Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha, 410128, People's Republic of China.
- Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, 410128, People's Republic of China.
| | - Jun Fang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China.
- Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha, 410128, People's Republic of China.
- Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, 410128, People's Republic of China.
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8
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Liu H, Xie Y, Li J, Zeng G, Li H, Xu F, Feng S, Xu H. Effect of Serratia sp. K3 combined with organic materials on cadmium migration in soil-vetiveria zizanioides L. system and bacterial community in contaminated soil. CHEMOSPHERE 2020; 242:125164. [PMID: 31669989 DOI: 10.1016/j.chemosphere.2019.125164] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 10/10/2019] [Accepted: 10/20/2019] [Indexed: 06/10/2023]
Abstract
Phytoremediation is an economical strategy to harvest cadmium (Cd) from contaminated soil, but the efficiency of phytoremediation was affected by many factors. This study investigated the potential of Serratia sp. K3 (K3) assisted with straw biogas residue (SBR) or leavening fertilizer (LF) on improving the Cd migration efficiency and micro-environment in soil-vetiveria zizanioides L. system. The results showed that the acid soluble Cd in soil was increased by 2.83-29.79% in treatments compared with control (CK). In addition, Cd accumulation in the roots and shoots of vetiveria zizanioides were significantly enhanced by the combination of K3 and SBR/LF. Especially, the translocation factor of Cd increased by 21.53-62.37% in groups with K3 compared with the groups without K3, correspondingly. Furthermore, SBR/LF effectively changed bacterial community structure, and improved bacterial abundance. Relative abundance of functional genes related with carbohydrate/energy/amino acid metabolism were increased in groups of SBRB/LFB rhizosphere compared with CK. These results provide insight into the change of phytoremediation efficiency and soil bacterial communities in the vetiveria zizanioides rhizosphere after inoculation. This study may provide a promising method for improving phytoremediation in Cd contaminated soil.
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Affiliation(s)
- Huakang Liu
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Yanluo Xie
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Junjie Li
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Guoquan Zeng
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Hao Li
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Fei Xu
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Su Feng
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, China.
| | - Heng Xu
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, China.
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Environmental pollution effects on plant microbiota: the case study of poplar bacterial-fungal response to silver nanoparticles. Appl Microbiol Biotechnol 2019; 103:8215-8227. [DOI: 10.1007/s00253-019-10071-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/29/2019] [Accepted: 07/29/2019] [Indexed: 01/21/2023]
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10
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Cocozza C, Perone A, Giordano C, Salvatici MC, Pignattelli S, Raio A, Schaub M, Sever K, Innes JL, Tognetti R, Cherubini P. Silver nanoparticles enter the tree stem faster through leaves than through roots. TREE PHYSIOLOGY 2019; 39:1251-1261. [PMID: 31180506 DOI: 10.1093/treephys/tpz046] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 12/11/2018] [Accepted: 04/06/2019] [Indexed: 06/09/2023]
Abstract
A major environmental pollution problem is the release into the atmosphere of particulate matter, including nanoparticles (NPs), which causes serious hazards to human and ecosystem health, particularly in urban areas. However, knowledge about the uptake, translocation and accumulation of NPs in plant tissues is almost completely lacking. The uptake of silver nanoparticles (Ag-NPs) and their transport and accumulation in the leaves, stems and roots of three different tree species, downy oak (Quercus pubescens Willd.), Scots pine (Pinus sylvestris L.) and black poplar (Populus nigra L.), were assessed. In the experiment, Ag-NPs were supplied separately to the leaves (via spraying, the foliar treatment) and roots (via watering, the root treatment) of the three species. Uptake, transport and accumulation of Ag were investigated through spectroscopy. The concentration of Ag in the stem was higher in the foliar than in the root treatment, and in poplar more than in oak and pine. Foliar treatment with Ag-NPs reduced aboveground biomass and stem length in poplars, but not in oaks or pines. Species-specific signals of oxidative stress were observed; foliar treatment of oak caused the accumulation of H2O2 in leaves, and both foliar and root treatments of poplar led to increased O2- in leaves. Ag-NPs affected leaf and root bacteria and fungi; in the case of leaves, foliar treatment reduced bacterial populations in oak and poplar and fungi populations in pine, and in the case of roots, root treatment reduced bacteria and increased fungi in poplar. Species-specific mechanisms of interaction, transport, allocation and storage of NPs in trees were found. We demonstrated definitively that NPs enter into the tree stem through leaves faster than through roots in all of the investigated tree species.
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Affiliation(s)
- C Cocozza
- Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali, Università di Firenze, via San Bonaventura 13, Florence, Italy
| | - A Perone
- Dipartimento di Bioscienze e Territorio, Università degli Studi del Molise, c.da Fonte Lappone snc, Pesche, Italy
| | - C Giordano
- Istituto Valorizzazione Legno e Specie Arboree, IVALSA-CNR, via Madonna del Piano 10, Firenze, Italy
| | - M C Salvatici
- Istituto di Chimica dei Composti Organo Metallici, ICCOM-CNR, via Madonna del Piano 10, Firenze, Italy
| | - S Pignattelli
- Istituto per la Protezione Sostenibile delle Piante, IPSP-CNR, via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - A Raio
- Istituto per la Protezione Sostenibile delle Piante, IPSP-CNR, via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - M Schaub
- WSL, Swiss Federal Institute for Forest, Snow and Landscape Research, Zürcherstrasse 111, Birmensdorf, Switzerland
| | - K Sever
- Department of Forest Genetics, Dendrology and Botany, Faculty of Forestry, University of Zagreb, Svetošimunska cesta 25, Zagreb, Croatia
| | - J L Innes
- Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, Canada
| | - R Tognetti
- Dipartimento di Agricoltura, Ambiente e Alimenti, Università degli Studi del Molise, via de Sanctis sns, 86100 Campobasso, Italy; 10
| | - P Cherubini
- WSL, Swiss Federal Institute for Forest, Snow and Landscape Research, Zürcherstrasse 111, Birmensdorf, Switzerland
- Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, Canada
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11
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Asad SA, Farooq M, Afzal A, West H. Integrated phytobial heavy metal remediation strategies for a sustainable clean environment - A review. CHEMOSPHERE 2019; 217:925-941. [PMID: 30586789 DOI: 10.1016/j.chemosphere.2018.11.021] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 10/01/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
Heavy metal contamination in the environment is a global threat which accelerated after the industrial revolution. Remediation of these noxious elements has been widely investigated and multifarious technologies have been practiced for many decades. Phytoremediation has attracted much attention from researchers. Under this technology, heavy metal hyperaccumulator plants have been extensively employed to extract extraordinary concentrations of heavy metals but slow growth, limited biomass and stresses caused by heavy metals imperil the efficiency of hyperaccumulators. Plant growth promoting rhizobacteria (PGPR) can help overcome/lessen heavy metal-induced adversities. PGPR produce several metabolites, including growth hormones, siderophores and organic acids, which aid in solubilization and provision of essential nutrients (e.g. Fe and Mg) to the plant. Hyperaccumulator plants may be employed to remediate metal contaminated sites. Use of PGPR to enhance growth of hyperaccumulator plant species may enhance their metal accumulating capacity by increasing metal availability and also by alleviating plant stress induced by the heavy metals. Combined use of hyperaccumulator plants and PGPR may prove to be a cost effective and environmentally friendly technology to clean heavy metal contaminated sites on a sustainable basis. This review discusses the current status of PGPR in improving the growth and development of hyperaccumulator plants growing in metal contaminated environments. The mechanisms used by these rhizosphere bacteria in increasing the availability of heavy metals to plants and coping with heavy metal stresses are also described.
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Affiliation(s)
- Saeed Ahmad Asad
- Centre for Climate Research and Development, COMSATS University, Park Road, Chak Shahzad Islamabad 45550, Pakistan.
| | - Muhammad Farooq
- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoud 123, Oman; Department of Agronomy, University of Agriculture Faisalabad, Pakistan
| | - Aftab Afzal
- Department of Botany, Hazara University Mansehra, Mansehra, Pakistan
| | - Helen West
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, United Kingdom
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12
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Chen Y, Ding Q, Chao Y, Wei X, Wang S, Qiu R. Structural development and assembly patterns of the root-associated microbiomes during phytoremediation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 644:1591-1601. [PMID: 30743871 DOI: 10.1016/j.scitotenv.2018.07.095] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/06/2018] [Accepted: 07/08/2018] [Indexed: 05/20/2023]
Abstract
Successful in situ phytoremediation depends on beneficial interactions between roots and microbes. However, the assembly strategies of root-associated microbiome during phytoremediation are not well known. Here we investigated the assembly patterns of root-associated microbiomes during phytoremediation as well as its regulation by both plants and heavy metals. Plant cultivation and soil amendment increased microbial diversity and restructured microbial communities. Rhizo-compartmentalization was the largest source of variation in root-associated microbiomes, with endosphere being the most independent and exclusive compartment. Soil type explained a larger amount of microbiomes variation in bulk soil and rhizosphere than that in endosphere. A specific core root microbiome was likely to be selected by the metal-tolerant plant H. cannabinus, with Enterobacteriaceae, Pseudomonadaceae and Comamonadaceae which contain a large number of metal-tolerant and plant growth-promoting bacteria (PGPB) being the most abundant families. The root-associated microbial community tended to proceed a niche-assembled patterns and formed a smaller bacterial pool dominant by Proteobacteria, Actinobacteria and Chloroflexi under metal-contaminated conditions. Among these genera, potential metal-tolerant PGPB species have taken up the keystone positions in the microbial co-occurrence networks, revealing their key roles in metal-contaminated environment due to niche selection. We also detected a keystone functional group reducing metal bioavailability which might work as vanguards and devote to maintaining the structure and function of the whole microbial community. In conclusion, this study suggested a specific assembly pattern of root-associated microbiomes of the metal-tolerant plant H. cannabinus during phytoremediation, showing the directional selections of the associated microbiomes by both the plant and metal-contaminated conditions in such a system.
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Affiliation(s)
- Yanmei Chen
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Qiaobei Ding
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Yuanqing Chao
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangdong 510275, China.
| | - Xiange Wei
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangdong 510275, China
| | - Shizhong Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangdong 510275, China
| | - Rongliang Qiu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangdong 510275, China
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13
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Lomaglio T, Hattab-Hambli N, Miard F, Lebrun M, Nandillon R, Trupiano D, Scippa GS, Gauthier A, Motelica-Heino M, Bourgerie S, Morabito D. Cd, Pb, and Zn mobility and (bio)availability in contaminated soils from a former smelting site amended with biochar. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:25744-25756. [PMID: 28730365 DOI: 10.1007/s11356-017-9521-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 06/12/2017] [Indexed: 06/07/2023]
Abstract
Biochar is a potential candidate for the remediation of metal(loid)-contaminated soils. However, the mechanisms of contaminant-biochar retention and release depend on the amount of soil contaminants and physicochemical characteristics, as well as the durability of the biochar contaminant complex, which may be related to the pyrolysis process parameters. The objective of the present study was to evaluate, in a former contaminated smelting site, the impact of two doses of wood biochar (2 and 5% w/w) on metal immobilization and/or phytoavailability and their effectiveness in promoting plant growth in mesocosm experiments. Different soil mixtures were investigated. The main physicochemical parameters and the Cd, Pb, and Zn contents were determined in soil and in soil pore water. Additionally, the growth, dry weight, and metal concentrations were analyzed in the different dwarf bean plant (Phaseolus vulgaris L.) organs tested. Results showed that the addition of biochar at two doses (2 and 5%) improved soil conditions by increasing soil pH, electrical conductivity, and water holding capacity. Furthermore, the application of biochar (5%) to metal-contaminated soil reduced Cd, Pb, and Zn mobility and availability, and hence their accumulation in the different P. vulgaris L. organs. In conclusion, the data clearly demonstrated that biochar application can be effectively used for Cd, Pb, and Zn immobilization, thereby reducing their bioavailability and phytotoxicity.
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Affiliation(s)
- Tonia Lomaglio
- LBLGC-EA 1207, INRA USC1328, Orléans University, rue de Chartres, BP 6759, 45067, Orléans CEDEX 2, France
- Department of Bioscienze and Territorio, Contrada fonte Lappone, University of Molise, 86090, Isernia, Italy
| | - Nour Hattab-Hambli
- LBLGC-EA 1207, INRA USC1328, Orléans University, rue de Chartres, BP 6759, 45067, Orléans CEDEX 2, France
| | - Florie Miard
- LBLGC-EA 1207, INRA USC1328, Orléans University, rue de Chartres, BP 6759, 45067, Orléans CEDEX 2, France
| | - Manhattan Lebrun
- LBLGC-EA 1207, INRA USC1328, Orléans University, rue de Chartres, BP 6759, 45067, Orléans CEDEX 2, France
- Department of Bioscienze and Territorio, Contrada fonte Lappone, University of Molise, 86090, Isernia, Italy
| | - Romain Nandillon
- LBLGC-EA 1207, INRA USC1328, Orléans University, rue de Chartres, BP 6759, 45067, Orléans CEDEX 2, France
- Campus Géosciences ISTO, UMR 7327 and CNRS/University of Orléans, 45071, Orléans CEDEX 2, France
| | - Dalila Trupiano
- Department of Bioscienze and Territorio, Contrada fonte Lappone, University of Molise, 86090, Isernia, Italy
| | - Gabriella Stefania Scippa
- Department of Bioscienze and Territorio, Contrada fonte Lappone, University of Molise, 86090, Isernia, Italy
| | - Arnaud Gauthier
- LGCgE, University of Lille 1, 59655, Villeneuve d'Ascq, France
| | - Mikael Motelica-Heino
- Campus Géosciences ISTO, UMR 7327 and CNRS/University of Orléans, 45071, Orléans CEDEX 2, France
| | - Sylvain Bourgerie
- LBLGC-EA 1207, INRA USC1328, Orléans University, rue de Chartres, BP 6759, 45067, Orléans CEDEX 2, France
| | - Domenico Morabito
- LBLGC-EA 1207, INRA USC1328, Orléans University, rue de Chartres, BP 6759, 45067, Orléans CEDEX 2, France.
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Pramanik K, Mitra S, Sarkar A, Maiti TK. Alleviation of phytotoxic effects of cadmium on rice seedlings by cadmium resistant PGPR strain Enterobacter aerogenes MCC 3092. JOURNAL OF HAZARDOUS MATERIALS 2018; 351:317-329. [PMID: 29554529 DOI: 10.1016/j.jhazmat.2018.03.009] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 02/19/2018] [Accepted: 03/06/2018] [Indexed: 05/28/2023]
Abstract
Heavy metal resistant PGPR mediated bioremediation, phytostimulation and stress alleviation is an eco-friendly method for sustainable agriculture in the metal contaminated soil. The isolation of such PGPR is highly demanding to reduce heavy metals in contaminated cultivated fields for agricultural benefit. The present study was successful to isolate a potent multi-heavy metal resistant PGPR strain, identified as Enterobacter aerogenes strain K6 based on MALDI-TOF MS, FAME analysis and 16S rDNA sequence homology, from rice rhizosphere contaminated with a variety of heavy metals/metalloid near industrial area. The strain exhibited high degree of resistance to Cd2+, Pb2+ and As3+ upto 4000 μg/mL, 3800 μg/mL and 1500 μg/mL respectively. Intracellular Cd accumulation of this strain was evidenced by AAS-SEM-TEM-EDX-XRF studies. Moreover, it showed several important PGP traits like IAA production, nitrogen fixation, phosphate solubilization, ACC deaminase activity even under high Cd stress (upto 3000 μg/mL). The combined effect of Cd resistance and PGP activities of this strain was manifested to the significant (p < 0.05) growth promotion of rice seedling under Cd stress by reducing oxidative stress (through antioxidants), stress ethylene and Cd uptake in seedlings. Thus K6 strain conferred Cd-tolerance in rice seedlings and could be applied as PGPR in contaminated fields.
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Affiliation(s)
- Krishnendu Pramanik
- Microbiology Laboratory, Department of Botany, Burdwan University, 713104, West Bengal, India
| | - Soumik Mitra
- Microbiology Laboratory, Department of Botany, Burdwan University, 713104, West Bengal, India
| | - Anumita Sarkar
- Microbiology Laboratory, Department of Botany, Burdwan University, 713104, West Bengal, India; Department of Botany, Government General Degree College, Singur, West Bengal, 712409, India
| | - Tushar Kanti Maiti
- Microbiology Laboratory, Department of Botany, Burdwan University, 713104, West Bengal, India.
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15
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Pramanik K, Mitra S, Sarkar A, Soren T, Maiti TK. Characterization of cadmium-resistant Klebsiella pneumoniae MCC 3091 promoted rice seedling growth by alleviating phytotoxicity of cadmium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:24419-24437. [PMID: 28895046 DOI: 10.1007/s11356-017-0033-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 08/24/2017] [Indexed: 06/07/2023]
Abstract
Cadmium (Cd) phytotoxicity in agricultural land is a major global concern now-a-days resulting in very poor yield. Plant growth-promoting rhizobacteria (PGPR)-mediated bioremediation is one of the convenient strategies for detoxification of Cd from the soil and for plant growth promotion under Cd stress. The selected strain K5 was identified as Klebsiella pneumoniae based on MALDI-TOF MS ribosomal protein and 16S rDNA sequence-based homology. The strain possessed several PGP traits viz. IAA production (3413 μg/mL), phosphate solubilization (80.25 ppm), ACC deaminase activity (40 ng α-ketobutyrate/mg protein/h), N2 fixation ability (1.84 μg N2 fixed/h), etc. and has the highest Cd resistance (4000 μg/mL) among Cd-resistant PGPR so far reported. This strain efficiently accumulated Cd and remained viable under Cd stress as confirmed by AAS-TEM-EDX analysis and viability test, respectively. The significant (p < 0.05) positive effect of the strain was reflected in various plant growth parameters like increased seed germination (50 to 90%), root length (5-fold), shoot length (about 2-fold), root fresh weight (> 2-fold), and shoot fresh weight (1.23-fold) under Cd stress compared with uninoculated set. Moreover, the positive impact of this strain on antioxidant enzyme activity (CAT, MDA, SOD) and several other biochemical parameters (proline, α-amylase, protease, total sugar, total protein, chlorophyll content) were also measured that favors plant growth promotion under Cd stress. Besides, the K5 strain also decreased stress-ethylene level under Cd stress and reduction of Cd accumulation in seedling (> 1.5-fold) was conducive to alleviate Cd phytotoxicity. Hence, K. pneumoniae strain K5 can be used as a phytostimulating and Cd-bioremediating biofertilizer for sustainable agriculture in heavy metal-contaminated sites.
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Affiliation(s)
- Krishnendu Pramanik
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Burdwan, WB, PIN 713104, India
| | - Soumik Mitra
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Burdwan, WB, PIN 713104, India
| | - Anumita Sarkar
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Burdwan, WB, PIN 713104, India
- Department of Botany, Government General Degree College, Singur, WB, PIN 712409, India
| | - Tithi Soren
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Burdwan, WB, PIN 713104, India
| | - Tushar Kanti Maiti
- Microbiology Laboratory, Department of Botany, The University of Burdwan, Burdwan, WB, PIN 713104, India.
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